Arguably saying the Red Arrows are a recruitment tool is just as aircrew-centric than giving an example of applicants to aircrew posts!
I'd also agree that the ATC is the public face of the RAF now (There are more Air Cadets than regular RAF - I'm sure you don't like the fact, neither do I!), and probably likely to become the main focus for recruitment efforts (if they're needed). So recruiting into the RAF is never going to be a problem, whatever the trade, particularly given the reducing numbers.